Most conspiracies are based from connneconnecting real facts. Most times those connections are disregard. As glitches, coincidences, mistakes, like in the election fraud.

In this case the subtext conspiracy being that the virus leaked from a Chinese lab, or a Chinese bat soup, or a weapon released by the Chinese government, or from a Chinese wet market, ... Mainstream is just slowly building many narratives, to let the sheep make the "connections"